Widget Properties

Changing some of the widget properties from hardware side is also supported.
For example, you can change the color of LED widget based on a condition:
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//change LED color
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Blynk.setProperty(V0, "color", "#D3435C");
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​
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//change LED label
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Blynk.setProperty(V0, "label", "My New Widget Label");
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​
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//change MENU labels
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Blynk.setProperty(V0, "labels", "Menu Item 1", "Menu Item 2", "Menu Item 3");
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​Set Property for single value field​
​Set Property for multi value field​
NOTE : Changing these parameters work only for widgets attached to Virtual pins (analog/digital pins won't work).
color, label widget properties are supported for all widgets :
label is string for label of all widgets.
color is string in HEX format (in the form: #RRGGBB, where RR (red), GG (green) and BB (blue) are hexadecimal values between 00 and FF). For example :
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#define BLYNK_GREEN     "#23C48E"
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#define BLYNK_BLUE      "#04C0F8"
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#define BLYNK_YELLOW    "#ED9D00"
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#define BLYNK_RED       "#D3435C"
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#define BLYNK_DARK_BLUE "#5F7CD8"
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On firmware side, widget objects also support setLabel() and setColor() functions.
Widget specific properties:
Button
onLabel / offLabel is string for ON/OFF label of button;
Styled Button
onLabel / offLabel is string for ON/OFF label of button;
onColor / offColor is string in HEX format for ON/OFF colors of the button;
onBackColor / offBackColor is string in HEX format for ON/OFF colors of the button background.
Music Player
isOnPlay is boolean accepts true/false.
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Blynk.setProperty(V0, "isOnPlay", "true");
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Menu
labels is list of strings for Menu widget selections;
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Blynk.setProperty(V0, "labels", "label 1", "label 2", "label 3");
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Video Streaming
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Blynk.setProperty(V1, "url", "http://my_new_video_url");
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Step
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Blynk.setProperty(V1, "step", 10);
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Image
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Blynk.setProperty(V1, "opacity", 50); // 0-100%
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Blynk.setProperty(V1, "scale", 30); // 0-100%
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Blynk.setProperty(V1, "rotation", 10); //0-360 degrees
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also, you can fully replace the list of images from the hardware:
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Blynk.setProperty(V1, "urls", "https://image1.jpg", "https://image2.jpg");
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or you can change individual image by it index:
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Blynk.setProperty(V1, "url", 1, "https://image1.jpg");
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You can also change widget properties via HTTP API.

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